function showcontent(url,id,eval_str){
    if(document.getElementById){
		var x=(window.ActiveXObject)?new ActiveXObject("Microsoft.XMLHTTP"):new XMLHttpRequest();
	}
    if(x){
		x.onreadystatechange=function() {
        el=document.getElementById(id);
        el.innerHTML='loading....';
        if(x.readyState==4&&x.status==200){
            el.innerHTML='';
            el=document.getElementById(id);
            el.innerHTML=x.responseText;
            eval(eval_str);
         }
    }
    x.open("GET",url,true);x.send(null);
    }
}